CN109926646A - A kind of sheared blank cutter - Google Patents
A kind of sheared blank cutter Download PDFInfo
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- CN109926646A CN109926646A CN201910150922.3A CN201910150922A CN109926646A CN 109926646 A CN109926646 A CN 109926646A CN 201910150922 A CN201910150922 A CN 201910150922A CN 109926646 A CN109926646 A CN 109926646A
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- tool
- cutting tool
- bottom tool
- shearing
- fix
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- 238000010008 shearing Methods 0.000 claims abstract description 61
- 230000007306 turnover Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Abstract
The present invention relates to a kind of sheared blank cutter, mainly solves that existing cutter shearing edge is less, cannot achieve turn-over and use, the problems such as part tool strength is poor.The sheared blank cutter includes fixing a cutting tool and bottom tool；It fixes a cutting tool and is square with bottom tool, fix a cutting tool and be provided with shearing edge on four sides of bottom tool, fix a cutting tool and be more than or equal to the diameter of maximum shear bar with the thickness of bottom tool.The shearing edge radius RA=(D+C)/2 to fix a cutting tool, the shearing edge radius RB=((D+C) × 1.02)/2 of bottom tool, wherein D is bar nominal diameter, and C is the bar diameter upper deviation.
Description
Technical field
The present invention relates to processing unit (plant)s, and in particular to a kind of sheared blank cutter.
Background technique
Accurate-shearing obtains the extensive use of forging enterprise because shear velocity is fast, high-efficient, end face is high-quality.Wherein justify
The generally following three kinds of common forms of bar accurate-shearing cutter, first is that as shown in Figure 1, upper and lower cutter is that long narrow shape is long
Cube respectively has on cuboid a single circular arc as shearing edge；Second is that as shown in Fig. 2, upper and lower cutter is cuboid,
Cuboid both ends respectively have a circular arc as shearing edge；Third is that as shown in Figure 3, Figure 4, fixing a cutting tool for cuboid, and rectangular
Respectively there is a circular arc at the both ends of body as shearing edge, and bottom tool is cylindrical shape, the cutters of these three forms the problem is that:
1) upper and lower cutter only has one to two along the shearing edge of shear direction, and quantity is few；
2) cutter thickness is improper, cannot achieve turn-over use；
3) the corresponding cutting edge roundness size of bar is improper in use, shears blank end face poor quality, and shear precision is poor；
4) part tool strength is poor, the basis reused without cutter；
5) also have after cutting edge abrasion and repaired by the way of built-up welding, but bead-welding technology itself is more complex, process
It is long, at high cost, be easy defective, chip off-falling is easy when reusing and falls off and the normal shearing service life is not achieved.
Summary of the invention
To solve the problems in the background art, the present invention provides a kind of sheared blank cutter.
The technical scheme is that
A kind of sheared blank cutter, including fix a cutting tool and bottom tool；Described fix a cutting tool with the end face of bottom tool is pros
Shape, described to fix a cutting tool and be provided with shearing edge on four sides of bottom tool, described fix a cutting tool is greater than with the thickness of bottom tool
Equal to the diameter of maximum shear bar, the shearing edge radius RA=(D+C)/2 to fix a cutting tool, the shear blade of the bottom tool
Port radius RB=((D+C) × 1.02)/2, wherein D is bar nominal diameter, and C is the bar diameter upper deviation, and the present invention strictly presses
Blade dimensions are designed according to above-mentioned empirical equation, so that bar matches with shearing edge size, error amount is minimum, it is ensured that shearing
Blank end face quality and shear precision.
Further, the shearing edge fixed a cutting tool and be provided with different specification size on four sides of bottom tool.
Further, described fix a cutting tool with the square size dimension of bottom tool is 3 times for shearing bar diameter.
Further, cross recess is provided on the end face fixed a cutting tool.
Further, described to fix a cutting tool and be provided with the mounting hole connecting with tool apron on bottom tool.
Further, the connecting hole connecting with backing plate is provided on the bottom tool.
Further, the hole for hoist for lifting is provided on the bottom tool.
Further, shoving hole and head-stamp slot are provided in the middle part of the end face of the bottom tool.
Further, described fix a cutting tool is designed and sized to mono- grade of N ㎜ with the shearing edge of bottom tool, and N is more than or equal to 1
Positive integer.
Further, described fix a cutting tool is designed and sized to mono- grade of 5 ㎜ with the shearing edge of bottom tool.
Compared with prior art, the present invention having following technical effect that
1. the end face of upper and lower cutter of the invention is square, shearing circular arc can increase to four, increase making for cutter
Use range；The thickness design of cutter is close with maximum shear bar diameter above and below, guarantees that cutter can be used with turn-over.
2. shearing edge size is multi gear according to bar specifications design by the present invention, and is had between Blade dimensions and bar diameter
Stringent size relationship, to guarantee to shear blank end face quality and shear precision；Cutter length and width dimensions and thickness difference
Maximum 3 times and 1 times for can shearing bar diameter are taken, ensure that tool strength, are laid the foundation for the reuse of subsequent tool.
3. first throwing when cutter throws processed and making small Blade dimensions cutter, four shearing circular arc i.e. eight shearing edges are all worn
Afterwards, expansion can be changed to continue to use to next specification, avoid the built-up welding multiplexing various problems of bring.
Detailed description of the invention
Fig. 1 is the round bar accurate-shearing cutter schematic diagram that existing upper bottom tool is long narrow shape cuboid；
Fig. 2 is the round bar accurate-shearing cutter schematic diagram that existing upper bottom tool is cuboid；
Fig. 3 is existing fixes a cutting tool as the round bar accurate-shearing cutter schematic diagram of cuboid；
Fig. 4 is that existing bottom tool is cylindric round bar accurate-shearing cutter schematic diagram；
Fig. 5 is sheared blank cutter structure schematic diagram one of the present invention；
Fig. 6 is sheared blank cutter structure schematic diagram two of the present invention；
Fig. 7 is sheared blank cutter shear history schematic diagram of the present invention.
Appended drawing reference: 1- fixes a cutting tool, 2- bottom tool, 3- shearing edge, 4- mounting hole, 5- material blocking block, 6- material-supporting device,
11- cross recess, 21- connecting hole, 22- hole for hoist, 23- shoving hole, 24- head-stamp slot.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments:
A kind of sheared blank cutter as shown in Figure 5, Figure 6, including fix a cutting tool 1 and bottom tool 2；It fixes a cutting tool 1 and bottom tool 2
End face be square, i.e., length it is equal with width, fix a cutting tool 1 and bottom tool 2 four sides on be provided with shearing edge 3, on
The thickness of cutter 1 and bottom tool 2 is more than or equal to the diameter of maximum shear bar.
Fix a cutting tool 1 end face on be provided with cross recess 11, the cross groove depth that intermediate position is outputed and shearing bar material
Matter is related, is mainly used for adjusting 2 gap of bottom tool.It fixes a cutting tool and is provided with the mounting hole 4 connecting with tool apron on 1 and bottom tool 2,
The convenient installation with tool apron.
When shear bar length it is smaller when, thickness of fixing a cutting tool is less than shearing bar length, and backing plate compensation need to be arranged and fix a cutting tool 1
Installation space.The connecting hole 21 connecting with backing plate is provided on bottom tool 2.The lifting for lifting is provided on bottom tool 2
Hole 22, mainly installation and removal are used.Shoving hole 23 and head-stamp slot 24 are provided in the middle part of the end face of bottom tool 2, among bottom tool 2
Four holes be charging ram release shearing blank when via hole；The kidney slot at intermediate position is head-stamp slot 24, for setting to cutter
Set mark.
Fix a cutting tool 1 and the Blade dimensions of bottom tool 2 be designed as mono- grade of N ㎜, N is the positive integer more than or equal to 1, specifically,
Fix a cutting tool 1 and the Blade dimensions of bottom tool 2 be designed as mono- grade of 5 ㎜.
The fix a cutting tool length-width direction of 1, bottom tool 2 of the present invention is both designed as square, and shearing circular arc can be increased by one to two
Four are added to, can all process circular arc on its four sides in this way, that is, 1, bottom tool 2 of fixing a cutting tool has 8 cutting edges (i.e. upper bottom tool
2 each there are four shear circular arc).When being therefore intended for single use under the same conditions, the quantity that cutter of the invention can be sheared is Fig. 1 shape
4 times of formula cutter are 2 times of Fig. 2, Fig. 3 form cutter.
If blade widths are B (along shear direction), maximum shear bar diameter is D, in order to guarantee the intensity of shearing tool,
B >=1.5D is required when single cutting edge, B >=3D when double blade；Secondly, above being cut to reach all available purpose of four direction
Tool 2, which should all design, to be square.Fig. 1 is because short of width can not be designed as double blade；Fig. 1, Fig. 2, Fig. 3 are because of cutter seat structure
Limitation, which can not design, to be square.
The present invention by cutter thickness design be it is close with maximum shear bar diameter, exactly in order to guarantee that cutter can be with turn-over
It uses, when such monolithic cutter first use, actual shearing quantity can turn over 1 times.The failure mode of cutting edge when due to sheared blank
Mainly be collapsed deforms, and can be horn-like cutting edge by original arc-shaped cutting edge deformation.If cutter with a thickness of H, deformed width
H, then h is generally the 1/4~1/3 of bar diameter D, if turn-over is wanted to use, it is necessary to assure effective cutting edge of another side after turn-over
Size, therefore the thickness H of cutter should be at least equal with maximum shear bar diameter, i.e. H >=D.
Based on practical experience, there is stringent size relationship between Blade dimensions and bar diameter.If bar nominal diameter is
D, the diameter upper deviation are C, then upper radius of edge RA=(D+C)/2, lower radius of edge RB=((D+C) × 1.02)/2.Wherein, D
For the nominal diameter for intending shearing specification bar corresponding to each cutting edge, C is to intend shearing the straight of specification bar corresponding to each cutting edge
The diameter upper deviation is fixed a cutting tool and shear blade that different specification size or same size size are provided on four sides of bottom tool
Mouthful, the bar of each shearing edge corresponding one quasi- shearing specification.The present invention designs cutting edge ruler in strict accordance with above-mentioned empirical equation
It is very little, it is ensured that shearing blank end face quality and shear precision；Meanwhile Blade dimensions are subjected to seriation according to bar specification and are set
Meter is mono- grade of 5mm, convenient for reusing.
The present invention first throws small size cutting edge cutter processed when cutter throws processed, complete to four shearing circular arc i.e. 8 shearing edges
After portion's abrasion, changed expansion to next specification and continued to use, then worn, then change expansion, until changing expansion to maximum Blade dimensions.Such as
Initial stage throws the 60 specification bar blade of Φ of system, and changing expansion after abrasion is 65 specification bar blade of Φ, and so on, until changing expansion
To maximum specification.Blade multiplexing is still an alternative is that Bead weld repair is to full size, but bead-welding technology itself is more complex, process
It is long, at high cost, be easy to be easy chip off-falling when defective, multiplexing and fall off and normal shearing service life is not achieved etc..In comparison, this
Change expand cutting edge multiplexing method it is more simple and easy to do, at low cost, effect is good, effectively preventing built-up welding multiplexing, bring is various asks
Topic.This method is easier to embody advantage when shearing is of large quantities, shearing bar specification.
As before, B >=3D when double blade, and upper and lower cutter should all be designed and be square so that four direction is all available, then
Comprehensively consider and change expansion multiplexing, therefore in the present invention, the equal value of cutter length and width dimensions is 3D, and thickness value is 1D, is being guaranteed
On the basis of tool strength, and most material-saving, so that the reuse for subsequent tool lays the foundation.
Cutter shown in Fig. 1, if it is X that it, which shears the service life, then cutter entire life of the invention can reach 40 times of Fig. 1, tool
Body calculates: cutting edge quantity of the present invention is four times of Fig. 1；Change expansion and change expansion to maximum specification from common minimum gauge, is followed successively by Φ
50, Φ 56, Φ 60, Φ 65, Φ 70, Φ 75, Φ 80, Φ 85, Φ 90, Φ 100, change and once double.Therefore monolithic of the present invention
Cutter actual shearing quantity can reach 40 times of Fig. 1 blade, so that the accurate-shearing cost of charp tool be greatly reduced.
The shear history of cutter for same of the present invention is shown in that Fig. 7 illustrates: upper sword moves up and down with sliding block, and lower sword is fixed, material blocking block 5
For limiting rod feeding position.Rod feeding contacts material blocking block 5 when shearing, and upper sword downlink under sliding block drive shears bar,
The passive downlink of material-supporting device 6, charging ram releases the blank cut after cutting, and sliding block returns, and primary shearing is completed.
Shearing tool of the present invention breaks through existing cutter structure and cutter uses technical thought, Fig. 5 of design and shown in fig. 6
Novel round bar accurate-shearing cutter, can not only greatly improve monolithic cutter uses shearing quantity for the first time, and can be real
Existing cutter repeatedly uses, and monolithic cutter actual shearing quantity maximum can increase by 40 times on the basis of the original, thus greatly
Width reduces the accurate-shearing cost of charp tool.
Claims (10)
1. a kind of sheared blank cutter, it is characterised in that: including fixing a cutting tool (1) and bottom tool (2)；
It is described to fix a cutting tool (1) and the end face of bottom tool (2) is square, it is described to fix a cutting tool (1) and four sides of bottom tool (2)
On be provided with shearing edge (3), it is described fix a cutting tool (1) and the thickness of bottom tool (2) be more than or equal to maximum shear bar it is straight
Diameter；
The shearing edge radius RA=(D+C)/2, shearing edge radius the RB=((D of the bottom tool (2) for fixing a cutting tool (1)
+ C) × 1.02)/2, wherein D is bar nominal diameter, and C is the bar diameter upper deviation.
2. sheared blank cutter according to claim 1, it is characterised in that: it is described fix a cutting tool (1) and bottom tool (2) four
The shearing edge (3) of different specification size is provided on a side.
3. sheared blank cutter according to claim 2, it is characterised in that: it is described fix a cutting tool (1) and bottom tool (2) just
Rectangular side length is having a size of shearing 3 times of bar diameter.
4. sheared blank cutter according to claim 1 or 2 or 3, it is characterised in that: it is described fix a cutting tool (1) end face on
It is provided with cross recess (11).
5. sheared blank cutter according to claim 4, it is characterised in that: it is described fix a cutting tool (1) and bottom tool (2) on
It is provided with the mounting hole (4) connecting with tool apron.
6. sheared blank cutter according to claim 5, it is characterised in that: be provided with connecting hole on the bottom tool (2)
(21)。
7. sheared blank cutter according to claim 6, it is characterised in that: be provided on the bottom tool (2) for hanging
The hole for hoist (22) of dress.
8. sheared blank cutter according to claim 7, it is characterised in that: setting in the middle part of the end face of the bottom tool (2)
There are shoving hole (23) and head-stamp slot (24).
9. sheared blank cutter according to claim 8, it is characterised in that: the cutting of (1) and bottom tool (2) of fixing a cutting tool
Cutting blade mouth is designed and sized to mono- grade of N ㎜, and N is the positive integer more than or equal to 1.
10. sheared blank cutter according to claim 9, it is characterised in that: described to fix a cutting tool (1) and bottom tool (2)
Shearing edge is designed and sized to mono- grade of 5 ㎜.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910150922.3A CN109926646B (en) | 2019-02-28 | 2019-02-28 | Bar shearing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910150922.3A CN109926646B (en) | 2019-02-28 | 2019-02-28 | Bar shearing tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109926646A true CN109926646A (en) | 2019-06-25 |
| CN109926646B CN109926646B (en) | 2024-04-12 |
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ID=66986040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910150922.3A Active CN109926646B (en) | 2019-02-28 | 2019-02-28 | Bar shearing tool |
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| Country | Link |
|---|---|
| CN (1) | CN109926646B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3418874A (en) * | 1965-09-03 | 1968-12-31 | Garringtons Ltd | Stock shear having a pair of pivotal shear blades |
| US5950314A (en) * | 1997-08-05 | 1999-09-14 | Chang; Jung-Hsien | Step-separating shearing tool |
| CN203992027U (en) * | 2014-08-13 | 2014-12-10 | 陈丽丽 | Circular two part sheared blank mould |
| CN208528202U (en) * | 2018-07-05 | 2019-02-22 | 成都莱克冶金机械设备制造有限公司 | Suitable for shearing the hydraulic tiltedly cutting edge of circular blank |
| CN210121701U (en) * | 2019-02-28 | 2020-03-03 | 宝鸡法士特齿轮有限责任公司 | Bar shearing tool |
-
2019
- 2019-02-28 CN CN201910150922.3A patent/CN109926646B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3418874A (en) * | 1965-09-03 | 1968-12-31 | Garringtons Ltd | Stock shear having a pair of pivotal shear blades |
| US5950314A (en) * | 1997-08-05 | 1999-09-14 | Chang; Jung-Hsien | Step-separating shearing tool |
| CN203992027U (en) * | 2014-08-13 | 2014-12-10 | 陈丽丽 | Circular two part sheared blank mould |
| CN208528202U (en) * | 2018-07-05 | 2019-02-22 | 成都莱克冶金机械设备制造有限公司 | Suitable for shearing the hydraulic tiltedly cutting edge of circular blank |
| CN210121701U (en) * | 2019-02-28 | 2020-03-03 | 宝鸡法士特齿轮有限责任公司 | Bar shearing tool |
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| Publication number | Publication date |
|---|---|
| CN109926646B (en) | 2024-04-12 |
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